chore(gha): Update actions/checkout from v3 to v4 (#351)

Resolve deprecation warnings for GitHub actions, see https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

Author: boidolr

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     # Runs a single command using the runners shell
     - name: Install prerequisites

.github/workflows/release.yaml

@@ -12,7 +12,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/tag.yaml

@@ -12,7 +12,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
           # The COMMIT_KEY secret contains a private SSH key. The associated public key